This thesis presents results from an AGCM sensitivity study in which the response in the Northern Hemisphere storm tracks to an imposed SST anomaly is investigated. The study was motivated by observational studies cited ...

Initial condition will improve the weather forecast and that is the subject in this master thesis. Will weather observations from aircrat improve the weather prognoses in Norway. Forecast have been made for observings ...

Ved å bruke en invers metode kan høydeprofilen av svoveldioksid (SO2) utslippene fra et vulkanutbrudd estimeres. Metoden bruker satellitt observerte SO2 kolonneverdier (AIRS, OMI) og en partikkel dispersjons modell (FLEXPART) ...

This thesis concerns the equilibrium climate response to an anthropogenic change in aerosols since pre-industrial times compared to a 63 % increased CO2 level in the atmospheric GCM CAM-Oslo coupled to a slab ocean model. ...

A short range, limited area ensemble prediction system, LAMEPS, is currently in operational use at the Norwegian Meteorological Institute. It employs 3D-Var for 6 hourly data assimilation cycling for analysis of the control ...

Clouds in the Arctic differ from clouds elsewhere in that they have a net warming effect at the surface. This happens because the longwave (LW) radiation dominates the radiation regime due to large solar zenith angles ...

In this thesis, transport pathways, temporal trends and seasonality of persistent organic pollutants (POPs) in the Arctic are examined. These pollutants, which can be transported over long distances, constitute a great ...

Aerosols have in recent years been given increased attention due to their effects on climate and health. Drastic reductions in sulphur emissions in Europe during the last two decades have led to a larger relative importance ...